Salsbury Cluster Box Unit with 16 Doors and 2 Parcel Lockers in Sandstone with USPS Access – Type III


USPS Approved Cluster Mailboxes – Florence cluster mailboxes offer safe, secure access to mail and package delivery 24 hours a day. Backed by a 5-year manufacturer’s warranty, these CBU’s are considered the industry standard for outdoor centralized mail delivery.


Item# 3316



10+ Units

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Salsbury 3300 Series Cluster Box Units (CBU’s) – USPS Access)

Cluster Box Units (CBU’s) manufactured by Salsbury Industries provide USPS access and offer a secure means of receiving mail and packages. They are ideal for commercial use or residential applications such as housing developments, apartments or townhouses. The 3300 Series is a USPS accessible CBU that includes a matching pedestal. Our cluster mailboxes are an excellent choice for durability because they are constructed of heavy-duty aluminum and stainless steel. See the additional features of our CBU’s below.


  • Salsbury Industries is officially licensed and authorized by the U.S. Postal Service to manufacture Cluster Box Units (CBU’s)
  • Manufactured by Salsbury Industries to U.S.P.S. “F” Specifications
  • License # 1CDSEQ-08-B-0026
  • Ideal for commercial and residential developments
  • Include matching pedestal
  • Constructed of heavy duty aluminum and stainless steel hardware
  • Feature a durable powder coated finish available in sandstone, bronze, green, black, white and gray (for replacement units only)
  • Accessed from the front through 2 easy opening master door panels
  • Available in “A” size doors (12-3/4″ W x 3-1/8″ H), “B” size doors (12-3/4″ W x 4-7/8″ H) and “C” size doors (12-3/4″ W x 6-3/4″ H)
  • Doors include a heavy duty 5 pin cylinder cam lock with a dust/rain shield and 3 keys
  • One compartment is labeled “Outgoing Mail” and includes a weather protection flap and an 11-3/4″ W x 3/4″ H mail slot
  • Include a carrier access door for U.S.P.S. installed master lock
  • Include 1, 2 or 4 fully integrated parcel locker(s): Small (12″ W x 10″ H) and Medium (12″ W x 13-1/2″ H)
  • Salsbury Industries is an ISO 9001:2015 certified company and has excelled in the field of manufacturing since 1936


  • Custom engraved placards
  • Custom engraved doors – regular
  • Custom engraved doors – black filled
  • Replacement locks
  • Additional keys
  • Key blanks
  • Regency CBU decorative top
  • Regency CBU decorative pedestal cover

More Product Information

Installation Instructions

Technical Drawing



Happy Customers


For over 15 years, Mailbox World has offered our customers the highest quality mailboxes at the lowest prices available online. At Mailbox World, you will find one of the largest selections of USPS approved commercial and community mailboxes in the industry. We provide a safe and secure online shopping experience, or you can contact a mailbox specialists by phone at 1-833-929-6245.

Why shop Mailbox World over some other mailbox websites you may find online?

Low Price Guarantee – Mailbox World guarantees the lowest price on every mailbox sold in our store. We check our competitor’s website weekly to make sure we are currently advertising the lowest prices. If you ever happen to find a lower price advertised somewhere else by a licensed dealer, just let us know and we’ll beat it…. Guaranteed.

Made in the USA - All of our Mailboxes are MADE in the USA and ship from Kansas, California, Ohio, Florida, or Michigan (depending on the brand).

Fast, Free Shipping – We offer free shipping on all mailbox orders over $6500 shipped within the contiguous United States. We can ship to AK, PR, as well as internationally. Please contact us for a quote if needed. Most stock items ship within 3 business days and custom items in about 2 weeks. Lift gate service is included for larger items.

Excellent Customer Service – At Mailbox World, our goal is to provide the best customer service in the industry. Our knowledgeable mailbox specialists are here to help and can be reached by phone, chat or email between 8:30am and 5:30pm EST. We love talking to our customers, so please reach out with any questions.

Contact Information:

Phone – Toll Free 833-929-6245

Email –

Technical Info

Product Cut Sheet: tech_3316
Installation Instructions: Install_CBU.PDF
Concrete Pad Size: Pad_Spec.PDF

Product Specs

Unit Dimensions:

Unit Size: 30.5″ W x 62.75″ H x 18″ D , 165 lbs.
Pedestal Size: 12″ W x 14.5″ H x 12″ D, 15 lbs.

Compartment Dimensions:
16 Doors: 12-3/4″ W x 4-7/8″ H x 15″D
1 Outgoing Mail Receptacle: 12″W x 4-3/4″H x 15″D (slot 11-1/2″W x 3/4″H)
Parcel Locker 1: 12 3/4″ W x 10 1/4″